NA/NB turbine outlet (downpipe upper section)

One of the sexiest pieces in our turbo kits.

We've found that fabricated downpipes are most prone to cracking right at the turbo. So nearly 20 years ago, we moved to a cast upper section. This is much more robust and solved the cracking problems. It's no coincidence that when Mazda designed the Mazdaspeed turbo system, they used a short cast turbine outlet as well.

We've recently revisited the design of these, improving their efficiency and dropping backpressure without sacrificing durability. They're all Cerakoted in C-7900 Glacier Titanium. It's rated for 1,800°F (980°C), so it's perfect for our application. Do you want even more info on our new manifolds and outlet? You're in luck! Check out our Knowledge Base article on them here.

The new design is a direct replacement for the previous one. Note that due to the decreased backpressure, you may need to adjust your boost control to prevent overboosting.

Compatible with all FM turbos that use a Garrett turbocharger and included in all new systems. Early cars with a one-piece downpipe will also require the lower section, but cars already equipped with a turbine outlet casting can use their existing lower section. Older sleeve bearing turbos will require a couple of holes in the outlet to be enlarged.

Includes all studs and mounting hardware. Does not fit the stock Mazdaspeed turbo.

While we'd suggest matching this with one of our downpipes (the hardest part of the exhaust to build yourself), if you'd like to build one yourself the bolt circle on the bottom of the outlet is 3.675" (center-to-center). All bolts are 90° apart, and the ID of the outlet is 2.5".